Product warranties (Tables)

3 Months Ended

Apr. 04, 2015

Product Warranties Disclosures [Abstract]

Provision for warranty obligations

The activity related to warranty obligations is as follows:

	Three Months Ended
	April 4, 2015			March 29, 2014
Balance at beginning of period	$	29,350		35,818
Warranty claims paid during the period	(8,475		)	(14,024	)
Warranty expense during the period	11,540			11,466
Balance at end of period	$	32,415		33,260